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《ao曝气生物滤池的除磷试验研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要曝气生物滤池(BAF)是符合我国国情的城市污水处理新工艺,近十几年来发展迅速,将成为解决我国所面临的严峻的水环境污染和水资源短缺问题的主要技术途径之一。本课题是通过改变曝气生物滤池工艺的工艺流程,研究其处理城市生活污水,对磷以及其他污染物的去除效果,摸索其去除磷的规律,力求提高曝气生物滤池对磷的去除效果,为曝气生物滤池工艺在我国污水处理领域的推广,提供理论依据。试验表明:曝气生物滤池处理生活污水在水力负荷为1.25m/h以内,当进水SS低于50.0时,曝气生物滤池对SS的去除率相对较低;当物理处理单元的填料为陶粒时,在较长的周期内,曝气生物滤池对SS的去除效果较好;在
2、物理处理单元为石英砂填料的情况下,反冲洗频率较高时,曝气生物滤池对SS的去除效果比较好。曝气生物滤池对COD的去除效果比较稳定,一般可以达到70%左右。好氧处理单元填料层高度对磷的去除率的影响较大,而有机负荷、气水比和运行时间的影响较小;曝气生物滤池对磷的去除主要发生在好氧处理单元,物理处理单元和厌氧处理单元只能部分去除磷;单纯的生物除磷效果较差,要使磷的去除达到排放标准,需要加后继处理工艺。关键词:曝气生物滤池;气水比;水力负荷;反冲洗周期AbstractBiologicalaeratedfiltersisamunicipalsewagetreatmenttechniq
3、uescorrespondtothesituationofChina,developedrapidlyinlasttenyears,willbeoneoftheimporta-nttechnicalapproachestosolvetheworldpollutionandshortageproblemfacedChi-na.Thispaperisbychangingthetechnogicalprocessofthebiologicalaeratedfilter,andstudythedealingwithcitylifesewage,andotherpollutants
4、onphosphorusremov-alefficiencyofthephosphorusremoval,felttherule,andstrivetoimprovethebiolo-gicalaeratedfiltersofphosphorusremovalefficiency,forbiologicalaeratedfilterstechnologyinChinainthefieldofsewagetreatmentpromotion,providesthetheorybasis.Theresultsshowthat:Biologicalaeratedfilterst
5、otreatsewageinhydraulicloadof1.25m/h,whenwaterwithinlessthan50.0SS,biologicalaeratedfilterstoSStheremovalrateofrelativelylow.Whenphysicaltreatmentunitispackingfortaoli,inalongcycle,thebiologicalaeratedfilterremovetoSSeffectisgood.Inthephysicaltreatmentunitforpackingcases,quartzsandreverse
6、washfrequencyhigh,biologicalaeratedfilterstoSSremovalefficiencyofbetter.BiologicalaeratedfiltersforremovalefficiencyofCODisstableandthegeneralcanreach75%.Goodoxygentreatmentunitpackingheighthasgreatinfluenceonphosphorusremovalrate,andorganicload,gas-waterartioandrunningtimelesseffect.Biol
7、ogicalaeratedfiltersonphosphorusremovalmainlyinaerobictreatmentunit,physicaltreatmentunitandanaerobictreatmentunitcanremovallittlepartofphosphorus.Biologicalphosphorusremovaleffectispoorer,tomakethephosphorremovaltoemissionsstandards,needingtoaddthesuccessorprocess.